Cascades of energy and helicity in axisymmetric turbulence

Bo Qu, Aurore Naso, and Wouter J. T. Bos
Phys. Rev. Fluids 3, 014607 – Published 18 January 2018

Abstract

A spectral analysis of strictly axisymmetric turbulence is performed. Both freely decaying and statistically steady flows are considered. In helical flows we identify a dual cascade, where energy is transferred towards the large scales and helicity to the smallest ones. It is shown that even in the absence of net helicity, a dual cascade persists, transferring energy backward and positively and negatively polarized helicity fluctuations forward.

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  • Received 21 July 2017

DOI:https://doi.org/10.1103/PhysRevFluids.3.014607

©2018 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Fluid Dynamics

Authors & Affiliations

Bo Qu, Aurore Naso, and Wouter J. T. Bos

  • Laboratoire de Mécanique des Fluides et d'Acoustique, CNRS, École Centrale de Lyon, Université Claude Bernard Lyon 1 and INSA de Lyon, 36 avenue Guy de Collongue, F-69134 Écully Cedex, France

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Vol. 3, Iss. 1 — January 2018

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